Package oracle.spatial.network.nfe.vis.maps.index

Class RTreeIndex

  • All Implemented Interfaces:
    java.io.Serializable
    public class RTreeIndex
extends AbstractSpatialIndex
implements java.io.Serializable
    Defines an RTree spatial index for a 2 dimensional space.
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      RTreeIndex()
      Creates a new instance

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean addEntry​(GeoObject feature)
      Adds an entry to the index
      boolean create​(java.util.Properties props)
      Creates the Rtree index with the given properties.
      boolean create​(java.util.Properties props, java.util.List<GeoObject> features)
      Creates the Rtree object with the input features using their MBR's.
      RTree getTree()
      Returns the internal Rtree structure
      boolean removeEntry​(GeoObject feature)
      Removes an entry from the index
      java.util.List<GeoObject> searchEntries​(java.awt.geom.Rectangle2D mbr)
      Returns all the entry that interact with the giveb MBR

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • RTreeIndex

        public RTreeIndex()
        Creates a new instance

    • Method Detail

      • getTree

        public RTree getTree()
        Returns the internal Rtree structure
        Returns:

      • create

        public boolean create​(java.util.Properties props)
        Creates the Rtree index with the given properties.
        Specified by:
        create in class AbstractSpatialIndex
        Parameters:
        props - the tree properties, which are: nodesize: the number of entries per node. Since this is a RAM- resident tree there is no need to match node size with disk pages and node sizes of 5-12 will give best results. Value 8 is used if this property is not defined. minimumFill: the number of entries in a node below which the node is considered underfull and the remaining entries orphaned and reinserted in the tree. If set to 1, there will be no orphaning. Value 1 is used if this property is not defined.
        Returns:
        true if the Rtree could be initialized

      • create

        public boolean create​(java.util.Properties props,
                      java.util.List<GeoObject> features)
        Creates the Rtree object with the input features using their MBR's.
        Specified by:
        create in class AbstractSpatialIndex
        Parameters:
        props - the tree properties, which are: nodesize: the number of entries per node. Since this is a RAM- resident tree there is no need to match node size with disk pages and node sizes of 5-12 will give best results. Value 8 is used if this property is not defined. minimumFill: the number of entries in a node below which the node is considered underfull and the remaining entries orphaned and reinserted in the tree. If set to 1, there will be no orphaning. Value 1 is used if this property is not defined.
        features -
        Returns:

      • addEntry

        public boolean addEntry​(GeoObject feature)
                 throws java.lang.Exception
        Adds an entry to the index
        Specified by:
        addEntry in class AbstractSpatialIndex
        Parameters:
        feature -
        Returns:
        true if the entry could be added
        Throws:
        java.lang.Exception

      • removeEntry

        public boolean removeEntry​(GeoObject feature)
                    throws java.lang.Exception
        Removes an entry from the index
        Specified by:
        removeEntry in class AbstractSpatialIndex
        Parameters:
        feature -
        Returns:
        true if the entry could be removed
        Throws:
        java.lang.Exception

      • searchEntries

        public java.util.List<GeoObject> searchEntries​(java.awt.geom.Rectangle2D mbr)
        Returns all the entry that interact with the giveb MBR
        Specified by:
        searchEntries in class AbstractSpatialIndex
        Parameters:
        mbr -
        Returns:
        a list of geo-objects that interact with the MBR